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Critical Degree of Saturation as a Threshold Moisture Level in Frost Weathering of Limestones

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  • Angélique Prick

Abstract

The moisture content has a deciding impact on the behaviour of a rock undergoing frost action. A particular critical degree of saturation Scr characterizes each material; only when the moisture content exceeds Scr will the material be damaged by frost. This parameter was defined for ten French limestones by measuring their dynamic Young's modulus. Scr values depend on porosimetric characteristics of the rocks, especially their trapped porosity. The critical degree of saturation accounts for the various rock dilatometrical behaviours during a freeze–thaw cycle. © 1997 John Wiley & Sons, Ltd. Le degré d'humidité d'une roche a une importance déterminante sur son comportement lorsqu'elle est soumise au gel. On peut définir pour chaque matériau un degré de saturation critique Scr au‐dessus duquel le gel causera des dommages. Ce paramètre Scr a été défini pour dix calcaires français en effectuant des mesures du module dynamique de Young de ces roches. Les valeurs des paramètres Scr obtenus dépendent des caractéristiques des roches et notamment de leur porosité piégée. Le degré de saturation critique, allié aux caractéristiques porosimétriques, permet d'expliquer les divers comportements dilatométriques de ces roches au cours d'un cycle de gel–dégel. © 1997 John Wiley & Sons, Ltd.

Suggested Citation

  • Angélique Prick, 1997. "Critical Degree of Saturation as a Threshold Moisture Level in Frost Weathering of Limestones," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 8(1), pages 91-99, January.
    • Handle: RePEc:wly:perpro:v:8:y:1997:i:1:p:91-99
    DOI: 10.1002/(SICI)1099-1530(199701)8:13.0.CO;2-4
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